He conducted a thought experiment to solve a problem in physics.

According to the law on specified alien species, the import of certain organisms is prohibited.

The Steller's jay was flying with its beautiful blue feathers spread out.

I saw a blue jay in the park.

Chemotransmitters play an important role in the transmission of information between nerve cells.

Neurotransmitters are responsible for transmitting information between nerve cells.

Sufficient caution is necessary when handling radioactive materials.

It is reported that North Korea has conducted another underground nuclear test.

He is an expert in experimental psychology.

He is spending a lot of time on experimental research.